Mitsui Seiki
ManufacturingNew Jersey, United States11-50 Employees
Mitsui Seiki USA, Inc. operates as the U.S. subsidiary of Mitsui Seiki Kogyo Co., Ltd., a Tokyo-based company with a long history in precision engineering. It produces high-precision machine tools, including five-axis CNC machining centers as well as jig boring and grinding machines, prioritizing accuracy, speed, and robust cutting performance. The firm serves industries that require hard-metal machining and ultra-high-tolerance components, such as aerospace, defense, power generation, and tooling. Mitsui Seiki USA is based in Franklin Lakes, New Jersey, and its parent traces its origins to 1928 in Japan, with a flagship Kawajima facility established in 2001 as a standard for precision manufacturing. In 2026, the group announced a facility expansion to Franklin, Tennessee, and a planned Innovation and Technology Center at its Franklin Lakes location.